Combined gas and coal range.



' J. A. LANSING.

COMBINED GAS AND COAL RANGE. APPLICATION FILED MAY 1, 191a.

1 1 9 1 ,086. Patented July 11, 1916.

v WHMEH L I a i j b I o 5 a? o o it o J. A. LANSING. COMBINED GAS AND COAL RANGE. APPLICATION FILED MAY I. mg.

1,191,086; I PatentedJu1y1L19l6.

"I i l j Y 6' III!!! mmmm. mm.rlo1uurnu. wumn mp. n. c.

. ing ranges, and the UNITED STATES PATENT *onnron. v

JAMES A. LANSING,'OF SCRANTON, PENNSYLVANIA, ASSIGNOR TO'SCRANTON'STQVE WORKS, or scRA roN, PENNSYLVANIA, A CORPORATION or PENNsYLVANIA COMBINED GAS AND CDAL RANGE.

Paten-ted J-uly 11, 1 916.

Application filed May 1, 1916. SeriaINo. 94,765.

To all 'whom it may concern Be it known that 1, JAMES A. LA sING, a citizen of the United States, residing at Scranton, in the county of Lacka-wanna an State of Pennsylvania, have invented certain new and useful Improvements in Combined Gas .and Coal Ranges; and I do hereby declare the following to be a full, clear, and exact description'of the same, reference being had to the'accompanying drawings, forming part of this specification.

This invention relates generally to improvements in combined gas and coal cookparticular object of the invention is toprovide a novel oven con-' struction in which the oven may be readily heated with equal efficiency either by the combustion of gaseous or solid fuel. When heating the oven with solid fuel, the prod ucts of combustion from the firebox must be conducted around the outside of the oven proper to prevent obnoxious. gases from reaching the food within the. oven, and, on the other hand, when heating with gaseous fuel, the burnermust be open to the interior of the oven and also to the atmosphere in order to obtain the draft suflicient to support combustion, and a proper heatingeffect within the oven. Thus thegas burner chamber must be disposed beneath the oven and within the bottom portion of the flue for the gases coming'from the coal firebox, and, since the gas burner chamber is neces sarily isolated from the flue space in which the chamber is positioned, it'has been/found that, when heating with'solid fuel, a considerable portion-of the oven remains cool, because of the inrush of outside air through the gaseous fuel chamber. The presentinvention obviates this difficulty by the provision of a simple form ofc'losurefor shutjoff the gas burner chamber from' comting the

munication both with thc interior of oven and the atmosphere when'using solid" 'fuel,'-thereby securing a dead air space,the

air of which becomes heateduniformly with the air in the flue passage around the oven, so that the heating effect is distributed with equal efficiency over the entire effectivearea of the oven.

Other objects of the invention are to'gen-Z erally improve the oven construction ofa range of the type specified, as will appear from the ensuing detailed description of .a

' dinal horizontal structural embodiment of the invention'in a.

preferred form.

The novel features of the invention will be particularlypointed out and specified in" the claims atthe end of'the specification. In the drawings'zeFigure 1 is a front elevation of a combined gas and coal range constructed in accordance with the present improvements, the front panelor wall of the range being removed to clearly illustrate the interior construction. Fig. 2 is a longitusectional elevation of the samev on the line 2 -2 of Fig. 1. Fig. 3 is a longitudinal vertical sectional elevation on the line 3-8 offlFig. 2. Fig. 4 is"a"trans-" verse vertical sectional elevation on the'line 4-4: of Fig. 1.

Like characters of reference in the several figures indicate the same parts.

As shown in the acoompanyingdrawings, the oven A is inclo-sed by the'top outer wall A, the side outer wall AF, the bottom outer Wall A the front outer wall A and the rear outeriwall A all of said walls being formed of suitable panels and connected together in any preferred manner well known in the art. The intermediate wall A separates the oven' from the fireboi'i B which may be of the usual construction adapted forthe combustion of solid fuel.- The top inner'wallG,

side inner \vallJC and bottom inner 'W'allC of the oven are spaced from the respective top side and bottom walls,

A", A A to form a continuous flue passage D for the circulation of'the products of combustion from the solid fuel firebox B. around the oven. 'The 'heated' air and products of combustion jfromfthe firebox B enter the flue passage D at the upperportionof said passage andpass' around the side portion thereof between the sidewalls C, A? and under the inner bottom wall C fthe gases exhausting through'fa flue opening D located in the rear wallA of the stove, between the upper and lower bottom walls of the oven.

g The above described construction provides forthe circulation of the'heated air from the firebox all the way around theoven,

whenheating the latter with solid fuel, and atthe" sametime the flue passage"D'lis en 'tirely isolatedfrom the interior of the oven so 'as' to prevent any of the'gases from the 7 coal coming in contact-with the food in the Within the space between the upper and lower bottom walls C A of the oven is the gas burner chamber E, said chamber being isolated from the solid fuel flue passage by e the outer vertical surrounding Wall of a flue member E, the upper openend of WlllCll' communicates with the interlor of the oventhrough an opening 0 in the upper bottom oven wall C and the lower open end of which communicates with the outside atmosphere through an opening a in the lower bottom oven wall A It will be understood that the openings 0 and a register with the respective open ends of the flue member E, thereby permitting the outside air to enter the oven A, under certain conditions which will be hereinafter more fully set forth. A gas burner E of any suitable construction is positioned within the chamber E, the said gas burner being utilized when it is desired to heat'the oven by burning gaseous fuel. In the chamber and positioned below the opening a in the-upperbottom Wall C of the oven is a seat, the latter being preferably formed at the upper end of an inner flue member E somewhat less in height than the outer flue member E. Y

' In the preferred construction illustrated in the drawings, the outer flue member E is formed of a single casting cylindrical or nearly cylindrical in shape and of an axial dimension suflicient to bridge the space betweenthe upper and lower bottom walls of the oven, the said casting seatingIo-ver the opening a in said lower wall and directly beneath the opening 0 in said upper wall. The

inner flue member E may also be constructed of a single casting adapted to be inclosed by the outer flue member E. The surrounch ing wall of the inner flue member however slopes inwardly toward the top in order that the seat 6 at the top of the inner flue member may be somewhatless in diameter than the opening 0 in the upper bottom wall C so as to permit of a ready location of said seat from the interior of the oven.

-An important feature of the invention consists in the provision of means for closing the opening between the gas burner chamber E and the oven and also the open ing between said chamber E and the outside atmosphere, thus securing a dead air space in the gas burner chamber, when it is de sired to'heat the oven by the combustion of solid fuel. This dead air space prevents the 7 outside air from reaching the upper or inner wall of the oven through the gas burner chamber, and thus, an even heatingof the oven, when burning solid fuel, is insured. A slmple way of carrying out this idea consists in providing a pair ofcover plates F, F, these being respectively of diameters to seat over the opening a in the inner bottom wall of the oven and the seat 6 at the top of the inner flue member F Preferably the their upper and lower spectively cover plates F, F are connected by a suitable bolt of the proper length to insure the cover plates seating over their respective openings, when applied. The wall of the oven surrounding opening a is preferably formed with a ledge 0 and the upper cover plate F is of a diameter to lie flush with the upper surface of said oven wall, the cover plate being provided with a recess and'lug formation f whereby the pair of plates may be lifted out and applied by means of an ordinary stove plate lifter. In heating the oven with solid fuel, the plates will be applied, thus providing a dead air space in the gas burner chamber between the upper and lower plates, preventing the outside air from reaching the interior of the oven or the top plate F through the opening a. When it is desired to utilize the gas burner E to heat the oven the plates will be removed, so as to permit the draft to blow the heat directlyinto the oven. The products of combustion from the gas burner pass out through a flue passage formed between an inner rear wall A and the outer rear wall A the inner rear wall having a plurality of flue openings a Mounted within the flue space between the walls C A is a deflector plate H. This plate is positioned between the flue opening D and the side portion of the flue, and connects the outer wall of the chamber E with the rear wall A of the oven, so as to deflect the gases and heated air issuing from the lower end of the side portion of the flue D around in front of the chamber E before the air and gases can pass out the rear flue opening D. Thus a complete circulation within the bottom flue space is insured.

WVhat is claimed is 1. In a combined gas and coal range, a coal combustion chamber, an oven having upper and lower spaced bottom walls forming a flue for the circulation of gases from said coal combustion chamber, a flue passage connecting the space between said walls with the coal combustion chamber, a gas burner chamber within the space between saidcwalls, said gas burner chamber composed of outer and inner flue members, the outer flue member bridging the space between the two bottom walls of the oven and the inner flue member having its upper end terminating below the upper bottom wall of the oven, bothsaid flue members open at ends, openings in the upper and lower bottom walls of the oven adapted to, register respectively with the open'ends of the gas burner chamber, and a pair of connected cover plates adapted reto seat over the opening in the upper bottom wall of the oven and the upper end of said inner flue member.

2. a'combined gas and coal range, a coal combustion chamber, an oven having upper and lower spaced bottom walls forming a flue for the circulation of gases from said coal combustion chamber, a flue passage connecting the space between said Walls with the coal combustion chamber, a gas burner chamber within the space between said walls, composed of an outer flue member bridging the space between the two bottom Walls of the oven and an inner conical flue member having its upper end terminating below the upper bottom Wall of the oven and provided with a seat, both said JAMES LANSING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

